During each players untap step, before the active player untaps permanents, all phased-in permanents with phasing that player controls phase out. Simultaneously, all phased-out permanents that had phased out under that players control phase in. The untap step begins All phased-in permanents with phasing that the active player controls phase out, and all phased-out permanents that the active player controlled when they phased out phase in
In addition to connecting back to earlier sets, flashback adds a lot of fun to gameplay
Its worth mentioning The Lost Cavern of Ixalans Explorers of the Deep Commander Precon, which cares quite about Merfolk and +1/+1 counters but if you arent fussed about budget, Universes Beyond: Warhammer 40,000s Necron Dynasties is an incredibly strong Commander Precon, especially if youre a fan of the Games Workshop franchise (or Space Marine 2)
Playing draw-go control like this in Commander when your deck runs a lot of targeted, specific interaction (as opposed to static abilities or sweepers) naturally positions you in the role I like to call Table Cop
You can use a site like MTGProxy to get reserved list cards for like $2 each
Attacking twice in a single turn before your opponent can properly set up defenses could be devastating
